土木工程标准计量规范(英文).doc

CONTENTSForeword to the first edition 1Foreword to the second edition 2Foreword to the third edition 3Section 1. Definitions 4Section 2. General principles 5Section 3. Application of the Work Classification 6Section 4. Coding and numbering of items 8Section 5. Preparation of the Bill of Quantities 9Section 6. Completion, pricing and use of the Bill of Quantities 13Section 7. Method-Related Charges 14Section 8. Work Classification 15Class A: General items, 16Class B: Ground investigation, 20Class C: Geotechnical and other specialist processes, 28Class D: Demolition and site clearance, 32Class E: Earthquake, 34Class F: In site concrete, 40Class G: Concrete ancillaries, 42Class H: Precast concrete, 46Class I: Pipe work-pipes, 48Class J: Pipework-fitting and Valves,50Class K: Pipework-manholes and pipework ancillaries,52Class L: Pipework-Support and protection,56Class M: Structure metalwork, 60Class N: Miscellaneous metalwork,62Class 0: Timer, 64Class P: Piles, 66Class Q: Piling Ancillaries,70Class R: Roads and paving,74Class S: Rail track,78Class T: Tunnels,82Class U: Brickwork, blockwork and masonry,8Class V; Painting,90Class W: Waterproofing,92Class X: Miscellaneous work,94Class Y: Sewer and water main renovation and ancillary works,96Class Z: Simple building works incidental to civil engineering works,102SECION 1. DEFINITIONS1.1 In this document and in Bills of Quantities prepared according to the procedure set forth herein the following words and expressions have the meanings hereby assigned to them, except where the context otherwise requires.1.2 Conditions of Contract means the ICE Conditions of Contac4 sixth edition(January 1991), prepared by the Institution of Civil Engineers jointly with the Association of Consulting Engineers and the Federation of Civil Engineering Ctractors.1.3 Words and expressions defined in the Conditions of Contract have the same meanings herein.1.4 All references to clauses are references to clauses numbered in the Conditions of Contract and references to paragraphs are references to paragraphs numbered therein.l.5 The word work includes work to be carried act, goods, materials and services to be supplied, and the liabilities, obligations and risks to be undertaken by the Contractor under the Contract.1.6 The expression expressly required means shown on the Drawings, described the Specification or ordered by the Engineer pursuant to the Contract.1.7 Bill of Quantities means a list of items giving brief identifying descriptions and estimated quantities of the work comprised in a Contract. 1.8 Daywork means the method of valuing work on the basis of time spent by the workmen, the materials used and the plant employed.1.9 Work Classification means the Work Classification set out in section 8.1.10 Original Surface means the surface of the ground before any work has been carried out.1.11.Final Surface means the surface indicated on the Drawings to whichexcavation is to be carried out.1.12 Commencing Surface means, in relation to an item in a Bill of Quantities, the surface of the ground before any work covered by the item has been carried out. Commencing Surface means, in relation to a group of items in a Bill of Quantities for work in different materials in an excavation or a bored, drilled or driven hole, the surface of the ground before any work covered by any item in the group has been carried out.1.13.Excavated Surface means, in relation to an item in a Bill of Quantities, the surface to which excavation included in the work covered by the item is to be carried out. Excavated Surface means, in relation to a group of items in a Bill of Quantities for excavation in different materials, the surface to which excavation included in the work covered by any item in the group is to be carried out1.14. A hyphen between two dimensions means a range of dimensions which includes all dimensions exceeding that preceding the hyphen but not exceeding that following the hyphen.1.15. BS means British Standard. References to British Standards are deemed to include equivalent national standards of member states of the European Community and European Community standards-SECTION 2. GENERAL PRINCIPLESTitle application and extent 2.1. The title of this document is the Civil Engineering Standard Method of Measurement, third edition, which is abbreviated to CESMM3. CESMM3 is intended to be used in conjunction with the Conditions of Contract and only in connection with civil engineering works and simple building works incidental to engineering works.2.2. CESMM3 provides for simple building works incidental to civil engineering works to be measured in accordance with class Z. CESMM3 does not deal with the preparation of Bills of Quantities for complex mechanical or electrical engineering work, or complex building work or work which is seldom countered in civil engineering contracts. Where any such work is to be included in a Contract for civil engineering work, it shall be itemized and described in the Bill of Quantities in sufficient detail to enable tenderers to price it adequately and the method of measurement shall be stated in the Preamble to the Bill of Quantities in accordance with paragraph 5.4.Object of CESMM32.3. The object of CESMM3 is to set forth the procedure according to which the Bill of Quantities shall be prepared and priced and the quantities of work expressed and measured. Objects of the Bill of Quantities 2.4 The objects of the Bill of Quantities are (a) to provide such information of the quantities of work as to enable tenders to be prepared efficiently and accurately (b) when a Contract has been entered into, to provide for use of the priced Bill of Quantities in the valuation of work executed.2.5. In order to attain these objects, work should be itemized in the Bill of Quantities in sufficient detail for it to be possible to distinguish between the different causes of work, and between work of the same nature carried out in different rations or in any other circumstances which may give rise to different considerations of cost. Consistent with these requirements the layout and content of the Bill of Quantities should be as simple and brief as possible.2.6 All work which is expressly required should be covered in the Bill of Quantities.2.7. CESMM3 seeks to attain these objects principally by the use of the Work Classification. This defines(a) how work is to be divided into separate items in the Bill of Quantities(b) the information to be given in item descriptions(c) the units in which the quantities against each item are to be expressed(d) how the work is to be measured for the purpose of calculating quantities.SECTION3. APPLICATION OF THE WORK CLASSIFICATIONItem description3.1. The Work Classification divides work commonly encountered in civil engineering contracts into 26 main classes. Each class comprises up to three divisions which classify work at successive levels of detail. Each division comprises a list of up to eight descriptive features of work. Each item description in the Bill of Quantities shall identify the component of work covered with respect to one feature from each division of the relevant class, e.g.Class H (precast concrete) contains three divisions of classification. The first classifies different types of precast concrete units. the second classifies different units by their dimensions, and the third classifies them by their mass. Each item description for precast concrete units shall therefore identify the component of work in terms of the type of unit, its dimensions and mass.Mode of description3.2. To avoid unnecessary length, item descriptions for Permanent Works shall generally identify the component of the Works and not the tasks to be carried out by the Contractor, e.g.An item should be described as Plain round mild steel bar reinforcement to BS 4449 nominal size 20 mm, not as Supply, deliver, cut, bend and fix plain round mild steel bar reinforcement to BS 4449 nominal size 20 mm.3.3. Where the work identified by an item is specifically limited, the limitation shall be stated in the item description, e.g.Plain round mild steel bar reinforcement to BS 4449 nominal size 20 mm excluding supply and delivery to the Site.Item descriptions for work which is divided between two classes require such limitations to be stated, e.g.Item descriptions for miscellaneous metalwork inserts which are to be cast into concrete require appropriate additional description if items are give, in both class G for casting in the inserts and class N for supplying the inserts.3.4. The work shall be divided into items in the Bill of Quantities so that the component of work which is included in each item does not exhibit more than one feature from each division of any one class of the Work Classification, e.g.One item for precast concrete work shall not include more than one of the types of concrete unit listed in the first division of class H, neither shall it include different units whose dimensions are not within one of the classifications listed in the second division of class H, nor shall it include different units whose mass does not lie within one of the ranges listed in the third division of class H.3.5. The unit of measurement for each item shall be that stated for the item in the Work Classification. The unit of measurement stated against a descriptive feature in the Work Classification shall apply to all items to which that descriptive feature applies.3.6 Measurement rules in the Work Classification set out the conditions under which work shall be measured and the method by which the quantities shall becomputed if other than in accordance with paragraph 5.18.3.7 Definition rules in the Work Classification define the extent and limits of the class of work represented by a word or expression used in the Work Classification and in a Bill of Quantities prepared in accordance with CESMM3.3.8 Coverage rules in the Work Classification provide that the work stated is deemed to be included in the appropriate items to the extent that such work is included in the Contract. A coverage rule does not state all the work covered by an item and does not preclude any of the work stated being covered by a Method-Related Change.3.9 Description of an item in addition to that required in accordance with paragraph 3.1 shall be given where required by any provision of section 5 or by any applicable additional description rule in the Work Classification. Where additional description is given, a separate item shall be given for each component of work exhibiting a different additional feature, e.g.Additional description rule Al of class H requires that the specification of the concrete in each precast concrete unit shall be stated. Accordingly, this rule also means that separate items shall be given for units cast from concrete of different specifications.3.10 Where a descriptive feature in the Work Classification identifies a range or group of dimensions and an applicable additional description rule requires the particular dimension to be stated, the range or group of dimensions shall not also be stated, e.g.Additional description rule A2 of class I requires that the nominal bores of pipes shall be stated in item descriptions. The range of nominal bore taken from the second division of the classification of class I shall not also be stated.3.11. Rules printed on a right-hand page above a double line apply to all work in the class. Other rules on a right-hand page apply to particular groups of items as shown by the classification table.SECTION 4. CODING AND NUMBERING OF ITEMSCoding4.1 For convenience of reference each item in the Work Classification has been assigned a code number consisting of a letter and not more than three digits. The letter corresponds to the class in the Work Classification in which the item occurs and the digits give the position of the item in the first, second and third divisions of the class, e.g.Code H 1 3 6 identifies an item asclass H precast concretefirst division 1 beamssecond division 3 length 7-10 mthird division 6 mass 5-10 t4.2 The symbol * is used in the rules to the Work Classification to indicate all numbers in the appropriate division, e.g.H 1 3 * means the group of code numbers from H 1 3 1 to H 1 3 8 inclusive.Item numbers 4.3 Code numbers may be used to number the items in the Bill of Quantities, the items within the Bill of Quantities being listed in order of ascending code numbers.4.4. Code numbers used as item numbers in the Bill of Quantities shall not for part of the item descriptions or be taken into account in the interpretation of Contract.Coding of unclassified items4.5. Where a feature of a item is not listed in the Work Classification the digit 9 shall be used in the appropriate positions in the code number.4.6 Where there is an item to which a division of classification does not apply or for which fewer than three divisions of classification are given the digit 0 shall be used in the appropriate position in the code number.Numbering of items with additional description4.7. Additional description given for an item in accordance with paragraph 3.9 is not represented by the code number. Where code numbers are used as item numbers a suffix number shall be used to distinguish items which have the same code number but different additional description. e.g. Additional description rule Al of class H requires that additional description be given for precast concrete units stating their position 1, the Works and the specification of the concrete used. If three items are required within one part of the Bill of Quantities to allow for precast concrete beams having the same code but different additional description, the items should be numberedH 1 3 6 . 1H 1 3 6 . 2H 1 3 6.SECTION 5. PREPARATION OF THE BILL OF QUANTITIESMeasurement of completed work5.1 Appropriate provisions of this section shall also apply to the measurement of completed work.Sections of the Bill of Quantities5.2 The Bill of Quantities shall be divided into the following sections,(a)List of principal quantities(b) Preamble (c) Daywork Schedule(d) Work items (gr